And don't forget Suzie- every change you make may feel odd at first! Your body needs to adjust to each change before you can really tell if it's a good change or not. Ideally, one should do a few rides with each change, and only make one small change at a time.
For me, last year what seemed like a just right reach to the hoods now seemed a bit too short and cramped, so I changed stems. I think my core muscles got a little stronger and so balancing my weight became a little easier for me.